﻿/* 1. Write an expression that checks if given integer is odd or even. */

// Add Reference to 'System.Numerics'.

using System;
using System.Numerics;

public class OddOrEven
{
    public static void Main()
    {
        BigInteger number;

        do
        {
            Console.Clear();
            Console.Write("The number = ");
            if (BigInteger.TryParse(Console.ReadLine(), out number))
                break;
        } while (true);

        if ((number | 1) == number)
            Console.WriteLine("is odd.");
        else
            Console.WriteLine("is even.");
    }
}